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发明名称
HOLDING TONE DEVICE FOR TELEPHONE SET
摘要
申请公布号
JPH01236845(A)
申请公布日期
1989.09.21
申请号
JP19880064323
申请日期
1988.03.17
申请人
TOSHIBA CORP;TOSHIBA AUDIO VIDEO ENG CORP
发明人
SUZUKI YASUO
分类号
H04M1/00;H04M1/80
主分类号
H04M1/00
代理机构
代理人
主权项
地址
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